I bought a couple Davis and Sanford V12 Tripods with fluid-heads to film weddings with my DSLRs and love them so far. Only problem is that I cannot figure out how to remove the heads. I'd like to attach one of the heads to my glidetrack. I tried locking the pan knob down fully and turning (both ways, just to be sure), but no luck.The 3 paragraph manual is no help and I can't hardly find anything about it online. Anybody have any experience with these?

Thanks for the response. I think you are probably right about it being welded on. It's a nice tripod for the price (I use these two as my B and C tripods), but that's a major setback. I also use a Manfrotto 501hdv on 190xprob legs, but (and I may be overlooking an easier way) you've got to unscrew 3 tiny screws every time you want to switch it out. Since it's my primary tripod and I'm a one-man crew, run and gunning doesn't really allow for this. I like your idea of a cheap manfrotto head. SInce they are just DSLRs, it wouldn't have to hold very much weight either. Otherwise I've got this great glidetrack sitting in my trunk just waiting to be used...